Make sure you use fresh, cold milk. Skim milk works best for frothing.

Use a stainless steel frothing pitcher, and ensure that it is cool before using.

Make sure the water reservoir is full.

Try moving the frothing pitcher slightly up and down while frothing.

The frothing tube needs to be cleaned after every use. First, fill the frothing pitcher with water, and run the steaming feature for twenty seconds. If steaming tube is blocked, use a toothpick to unblock it. Then, steam the water for another 30 seconds.